Off-topic but: I love the font on the website. At first I thought it was the classic Computer Modern font (used in LateX). But nope. Upon inspection of the stylesheet, it's https://edwardtufte.github.io/et-book/ which was a font designed by Dmitry Krasny, Bonnie Scranton, and Edward Tufte. The font was originally designed for his book Beautiful Evidence. But people showed interest in font, see the bulletin board on ET's website: https://www.edwardtufte.com/bboard/q-and-a-fetch-msg?msg_id=... Initially he was reluctant to go the trouble of releasing it digitally. But eventually he did make it available on GitHub.